code: def tearDownClass(self):
      os.remove(
          os.path.join(self.tfidf_model_path, "tfidfaug_w2idf.txt")
      )
      os.remove(
          os.path.join(self.tfidf_model_path, "tfidfaug_w2tfidf.txt")
      )
  
file_path: nlpaug/test/augmenter/word/test_word.py
imports: import unittest
  import os
  from dotenv import load_dotenv
  import nlpaug.augmenter.word
  from nlpaug.util import Action, Doc
label_desc: Use image node_id 2 for calling the TestWord obj's underlying member method code with example usage: obj.tearDownClass() without return types